Lamp socket



Oct. 8, 1929. SCOFIELD 1,731,205

LAMP SOCKET Filed Aug. 24. 1926 INE/ENTORS I BY Q W/ T 55 i 1 g A ing Patented Get. 8, 1929 UNITED STATES PATENT; OFFICE THEODORE J. SCOFIELD AND GEORGE A. WHITE, 01 JACKSON, MICHIGAN, ASSIGNORS TO THE SPARKS-WITHINGTON COMPANY, OF JACKSON, MICHIGAN, A CORPORATION OF OHIO LAMP SOCKET Application filed August 24, 1926. Serial No. 131,213.

This invention relates to a certain new and improved lamp socket.

The main object of this invention is the production of an eflicient lamp socket of simple construction and which can be produced at a comparatively low cost.

Other objects and advantages relate to the details of the structure and the form and relation of the parts thereof, all as will more fully appear from the following description, taken in connection with the accompanying drawings, in which:

Figure 1 is a perspective View of a lamp socket of this invention.

Figure 2 is a section on line 2-2, Figure 1.

Figure 3 is a section on line 3-3, Figure 2.

The lamp socket of this invention comprises a cup-shape shell 1 which may be formed of sheet metal or other suitable material and which is of a diameter in crosssection suitable for receiving a lamp-base of substantially pre-determined size. For this purpose the Wall of the shell near the open end is formed in this instance with a plurality of substantially parallel ribs or threads 2, which extend only part-way around the circumference of the shell. For illustration, they may extend throughout substantially one-third the circumference of the shell and the threads upon the base of the lamp socket A are adapted to engage in the grooves between these threads to lock the lamp in place in the open end of the shell.

These ribs or partially complete threads may be formed by indenting substantially parallel portions of the wall of the shell.

The base of the shell 1 is formed with a central opening of a size adapted to receive one end of an insulating bushing 4 preferably formed with a radially and outwardly extending flange 5 at its forward end between which flange and the base of the shell 1 a coil spring -6 is adapted to be confined for holding the contact end 7 of the screw or bolt -8 constantly against the contact 9- as usually formed at the central portion of the lamp base. The bolt or screw -8 extends through the bushing 1, the head -8 contacting with the forward end of the bushing to limit its movement in one direction. The bolt -8 also extends through an insulating disk -10 positioned outside the base of the socket or shell 1, and held in contact with the external surface of the base of the shell 1 and with the end of the bushing 4 by me8ans of nut 11 threaded upon the bolt The terminal member -12 may be mounted on the bolt 8 between the insulating disk 10 and the nut -11- and with the construction described all of the parts are maintained in proper relation with the bolt 8 including the contact head 7 insulated from the shell -1, to which shell a second terminal 13-- may be secured as by solder or otherwise.

It will be apparent that the structure dis closed is of comparatively simple construction and that the parts are so related and secured together as to be maintained in proper relative position, and that the lamp A may be readily secured in the shell by relative rotary movement of the lamp and shell while itis only necessary to stamp the grooves or threads in one side of the socket or shell, and altho we have shown and described a specific construction, form and relation of parts, we do not desire to restrict ourselves to the exact details of structure, as various changes and modifications may be made within the scope of the appended claims.

We claim:

1. A lamp socket comprising a cup-shape shell having an opening through its base adapted to receive the end of a bushing, a bolt extending through the opening, a flanged bushing surrounding the bolt within the shell and having its upper end extending into the opening in the shell and a spring disposed between the flange on the bushing and the base of the shell.

2. A lamp socket comprising a cup-shape shell having an opening through its base adapted to receive the end of a bushing, a bolt extending through the opening, a flanged bushing surrounding the bolt within the shell, and having its upper end extending into the opening in the shell, a spring disposed between the flange on the bushing and use the base of the shell, an insulating disk mounted on the bolt outside the shell and means on the bolt for clamping'the parts in desired position.

3. A lamp socket comprising a cup-shape shell having an opening in its base, a bushing having one end positioned in said opening and its other end formed with a flange extending radially outwardly within the shell, a headed bolt extending through the bushing, an insulating disk mounted on the bolt outside of and in contact with the base of the shell, a nut mounted on the bolt for securing the parts in position, and a sprin interposed between the flange on the bushlng and the base of the shell. Y

4. A lamp socket comprising a cup-shape shell having an opening through its base, a bushing having one end positioned in and substantially fitting the opening and its other end positioned Within the shell, a bolt extending through the bushing an insulating disk mounted on the bolt outside of andiin contact with the shell, and means on the bolt for holding the parts in predetermined position.

In Witness whereof we have hereunto set our hands this 31st day of J uly, 1926.

THEODORE J. SCOFIELD. GEORGE A. WHITE. 

